<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<form method="post" th:action="@{/pay}">
    <button type="submit">v1版本支付</button>
</form>
<br/>

<form method="post" th:action="@{/v2/pay}">
    <button type="submit" value="1">发起v2版本paypal支付</button>
</form>

</body>
</html>